Beneath the turquoise waters off the coast of Colombo lies a treasure trove of history, adventure, and marine wonder. From sunken cargo ships to forgotten tugboats, the shipwrecks scattered along Sri Lanka’s western coastline offer some of the most exhilarating diving experiences in the Indian Ocean. Each wreck tells a unique story—of voyages gone awry, maritime trade routes, and nature’s quiet reclamation of human ingenuity.

But these shipwrecks are more than just remnants of the past; they are sparkling ecosystems teeming with life. Picture schools of shimmering fish weaving through coral-encrusted steel hulls, lionfish gliding gracefully above decks frozen in time, and the occasional shadow of a majestic whale shark passing by. Whether you are a seasoned diver chasing the thrill of deep-water exploration or a novice looking to dip your fins into the world of wreck diving, Colombo’s underwater heritage promises a journey unlike any other.

In this guide, we will uncover the most famous shipwrecks around Colombo, their fascinating histories, and the mesmerizing marine life they host. 

So, strap on your gear, adjust your buoyancy, and prepare to dive into a world where history and marine magic collide. Let us explore the hidden treasures beneath Colombo’s waves!

 

Thermopylae Sierra

  • History:
    This 155-meter-long Cypriot cargo ship sank in 2012 after being abandoned in Colombo Harbor in 2009 due to financial disputes. It eventually broke free during a storm and grounded on a reef, sinking shortly after.
  • Why It’s Significant:
    The wreck is accessible to divers of all levels and has become a thriving artificial reef. Its size and relatively shallow depth make it one of Colombo’s most popular dive sites.
  • Depth:
    The wreck lies between 7 and 23 meters, making it ideal for both beginners and advanced divers.
  • PADI License Required:
    Open Water Diver certification is sufficient for exploring this wreck due to its shallow depth.
  • Exact Location:
    Off the coast of Dehiwala, approximately 30 minutes by boat from Colombo.
  • Marine Life:
    Schools of parrotfish, surgeonfish, snapper, trevally, and sometimes even whale sharks during the migration season.
  • Look Out For:
    Large sections of the ship’s hull and intricate coral formations. Be cautious of strong surface currents.
  • Additional Tips:
    Best dived during the calm season (November to April) for clearer visibility.

Chief Dragon (Car Wreck)

  • History:
    A 112-meter-long car carrier that sank in 1983 after catching fire while en route to Colombo. It is also known as the “Car Wreck” because of the vehicles it carried.
  • Why It is Significant:
    The upright position of the wreck provides a unique diving experience, offering easy navigation through its coral-encrusted structure.
  • Depth:
    The wreck lies between 24 and 35 meters, making it suitable for more experienced divers.
  • PADI License Required:
     Advanced Open Water Diver certification is recommended due to the depth.
  • Exact Location:
    Approximately 12 kilometers offshore from Colombo Harbor.
  • Marine Life:
    Barracuda, trevally, mackerel, moray eels, and schools of fusiliers are common. Coral growth is abundant on the ship’s deck.
  • Look Out For:
    Car chassis still visible inside the wreck and coral-covered deck structures. Watch for strong currents at the deeper sections.
  • Additional Tips:
    Carry a dive torch to explore darker sections and observe marine life hiding in crevices.

Nilgiri (Tug Wreck)

  • History:
    A harbor tugboat that sank in 1997 under mysterious circumstances, the Nilgiri has become a favorite dive site due to its compact size and accessibility.
  • Why It’s Significant:
    The wreck lies upside down, offering a unique diving perspective and a chance to observe marine life around its twin propellers.
  • Depth:
    The wreck rests at approximately 32 meters.
  • PADI License Required:
    Advanced Open Water Diver certification is necessary due to the depth.
  • Exact Location:
    About 8 kilometers from the coast of Colombo.
  • Marine Life:
    Large lionfish, grouper, trevally, and plenty of smaller reef fish.
  • Look Out For:
    The twin propellers, now home to vibrant coral growth, and the hull’s intricate details.
  • Additional Tips:
    Ideal for underwater photographers due to the wreck’s well-preserved state and interesting angles.

Toilet Barge

  • History:
    This small wreck, approximately 20 meters in length, earned its name from a solitary toilet found on its deck. It was likely a utility barge used for waste disposal.
  • Why It’s Significant:
    Despite its unassuming history, the wreck is a vibrant marine habitat, covered in black coral trees.
  • Depth:
    The wreck sits at 32 meters.
  • PADI License Required:
    Advanced Open Water Diver certification is needed.
  • Exact Location:
    Off the coast of Mount Lavinia, near Dehiwala.
  • Marine Life:
    Abundant reef fish, including angelfish, snappers, and moray eels. The black coral trees are a highlight.
  • Look Out For:
    The unusual solitary toilet and the lush coral growth covering the wreck.
  • Additional Tips:
    Best for divers seeking a quirky and unique wreck diving experience.

Black Coral Wreck

  • History:
    An unidentified shipwreck adorned with large black coral trees, adding mystery and allure to its story.
  • Why It’s Significant:
    Its depth and strong currents make it a challenge for experienced divers while rewarding them with vibrant coral and marine life.
  • Depth:
    The wreck lies at 40 meters.
  • PADI License Required:
    Deep Diver certification is recommended due to the depth and technical nature of the dive.
  • Exact Location:
    Off the coast of Colombo, approximately 14 kilometers offshore.
  • Marine Life:
    Schools of snapper, lionfish, angelfish, and even reef sharks on occasion.
  • Look Out For:
    Intricate black coral formations and larger pelagic species that frequent the area.
  • Additional Tips:
    Dive with an experienced guide familiar with the wreck to navigate safely and maximize the experience.

General Tips for Diving Around Colombo

  1. Best Time to Dive: November to April offers calm seas and good visibility.
  2. Safety: Strong currents can occur, so always dive with a certified guide.
  3. Gear: Ensure your dive computer and torch are in good working order, as some wrecks have deeper sections or areas with limited light.
  4. Marine Protection: Avoid touching coral and marine life to preserve these underwater ecosystems.

These shipwreck dives near Colombo provide an exciting mix of history, marine biodiversity, and adventure, making them must-visits for divers exploring Sri Lanka!